Patents by Inventor Shozo Kishi
Shozo Kishi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20240019055Abstract: A ring body to be provided in a pipe joint which can prevent a spigot from separating from a socket by a spigot protrusion engaging with a lock ring from the back side of the socket in the separation direction A of the spigot. The ring body includes a main body part which is inserted into between the inner peripheral surface of the socket and the outer peripheral surface of the spigot to be provided in the pipe joint, and a deviation prevention member that prevents the main body part from deviating to the opening end side of the socket, wherein the main body part moves the spigot in the pipe radial direction with respect to the socket, thereby reducing deviation in the pipe radial direction between the pipe axis of a first pipe and the pipe axis of a second pipe.Type: ApplicationFiled: October 5, 2020Publication date: January 18, 2024Applicant: KUBOTA CORPORATIONInventors: Shozo KISHI, Keita ODA, Ryunosuke TANAKA
-
Publication number: 20230400128Abstract: A pipe joint is provided in which a seal member insertion space 14 is formed between a first tapered surface 8 of a socket 5 and an outer circumference of a spigot 3, a seal member 15 is inserted into the seal member insertion space 14, and a gland 17 that presses the seal member 15 into the seal member insertion space 14 is externally fitted to the spigot 3. The seal member 15 has a bulb part 26 at one end part thereof. A guide part 29 that guides the bulb part 26 from an opening end face 16 of the socket 5 into the seal member insertion space 14 is formed on the inner circumference of the socket S. The guide part 29 has a second tapered surface 30. An angle of inclination of the second tapered surface 30 is greater than an angle of inclination of the first tapered surface 8.Type: ApplicationFiled: October 29, 2021Publication date: December 14, 2023Applicant: KUBOTA CORPORATIONInventors: Ryunosuke TANAKA, Keita ODA, Shozo KISHI
-
Patent number: 11746937Abstract: A pipe joint in which a seal body and a spacer are mounted from the insides of pipes, wherein: a spigot of one pipe is inserted into a socket of the other pipe; and an annular accommodation space is formed between the inner circumference of the socket and the outer circumference of the spigot. Inside the accommodation space are accommodated: a seal body for sealing the gap between the socket and the spigot; a push ring that presses the seal body to keep the seal body in a compressed state; and a spacer that maintains the interval between the push ring and the deep end of the socket in the pipe axial direction.Type: GrantFiled: March 19, 2019Date of Patent: September 5, 2023Assignee: KUBOTA CORPORATIONInventors: Shozo Kishi, Kazuya Ito, Kazuma Harada, Keita Oda, Ryunosuke Tanaka, Kohei Ikeda, Yuito Komaru
-
Publication number: 20230139386Abstract: A watertightness testing method for testing watertightness of a joined section (4) where one end section of a second pipe (3) is joined to a first pipe (2), the watertightness testing method including: inserting a testing device body (21) into the first pipe (2); attaching an assembling device (80) to another end section of the second pipe (3); attaching a pulling device (82a) to the assembling device (80) and connecting the pulling device (82a) to a strap-shaped member (112a) having been wound in advance around an outer circumference of the first pipe (2); operating the pulling device (82a) and pulling the strap-shaped member (112a) in a separating direction of the second pipe (3) to have a reaction force generated in the second pipe (3) cause the second pipe (3) to be pulled in a joining direction (G), the one end section of the second pipe (3) to be inserted into the first pipe (2), and the second pipe (3) to be joined to the first pipe (2); and operating a moving operation rod (22) provided in the testingType: ApplicationFiled: March 15, 2021Publication date: May 4, 2023Applicant: KUBOTA CORPORATIONInventors: Yuito KOMARU, Shozo KISHI, Masataka SHIMOMURA, Daichi HIGASA, Kohei IKEDA
-
Publication number: 20230091354Abstract: In a pipe joint, a spigot is inserted into a socket; a lock ring is accommodated in a lock ring-accommodating groove formed in the inner circumference of the socket; and an engaging part formed in the outer circumference of the spigot, wherein the engaging part engages with the lock ring from a back side of the socket in a separation direction A of the spigot, thereby preventing the spigot from separating from the socket. The engaging part is formed at a position receding from a distal end of the spigot in the separation direction A of the spigot. A bending suppressing member for restricting the socket and the spigot in a bending direction C is provided between the inner circumference of the socket and the outer circumference of the spigot in the range between the distal end of the spigot and the engaging part.Type: ApplicationFiled: October 5, 2020Publication date: March 23, 2023Applicant: KUBOTA CORPORATIONInventors: Shozo KISHI, Keita ODA, Ryunosuke TANAKA
-
Publication number: 20220244043Abstract: Provided is a bending angle calculation method capable of saving a worker time and effort. The bending angle calculation method includes: an image capturing step (S1) of capturing an image of a pipe in which a first pipe and a second pipe are joined together by a joint; a derivation step (S3) of deriving, from the image, a laying direction straight line corresponding to a laying direction of the pipe; and a calculation step (S4) of calculating, as a bending angle at the joint, a crossing angle between a laying direction straight line of the first pipe and a laying direction straight line of the second pipe.Type: ApplicationFiled: June 19, 2020Publication date: August 4, 2022Applicant: Kubota CorporationInventors: Shozo KISHI, Akira YAMASHITA, Kazuma HARADA, Tamon IDEN
-
Publication number: 20220196509Abstract: A watertight testing device includes a cylindrical core fit into a pipe joint part, a first seal member for sealing between the outer surface of the core and the inner surface of one pipe, a second seal member for sealing between the outer surface of the core and the inner surface of the other pipe, a first pressing member for pressing and compressing the first seal member into a first seal-member insertion space, a second pressing member for pressing and compressing the second seal member into a second seal-member insertion space, a moving device for moving the first and second pressing members in a pipe axial direction, and a test fluid feeder for feeding a test fluid into a test space.Type: ApplicationFiled: March 24, 2020Publication date: June 23, 2022Applicant: KUBOTA CORPORATIONInventors: Shozo KISHI, Yuito KOMARU, Koji KAMACHI, Masataka SHIMOMURA
-
Publication number: 20220178471Abstract: A pipe joining method includes a moving of a first transport trolley with a loaded first pipe and a second transport trolley with a loaded second pipe forward, a joining of one end of the first pipe to another end of a rearmost pipe of a pipeline, a lifting of another end of the first pipe, a moving of the first transport trolley and the second transport trolley backward, a drawing of the first transport trolley from beneath of the first pipe to the near side, a removing of a coupler to separate the first transport trolley and the second transport trolley, a moving of the first transport trolley backward, a drawing of the first transport trolley below the second pipe loaded on the second transport trolley, and a moving of the second transport trolley forward with the first transport trolley.Type: ApplicationFiled: March 19, 2020Publication date: June 9, 2022Applicant: KUBOTA CORPORATIONInventors: Shozo KISHI, Kazuya ITO, Yuito KOMARU, Ko ISHIMURA, Masataka SHIMOMURA, Yutaka FUJIMOTO, Kento HIGASHI
-
Patent number: 11333278Abstract: A pipe-joining centering device aligns, with an axial center of one pipe, an axial center of another pipe when a spigot of the other pipe is to be inserted into a socket of the one pipe. The pipe-joining centering device includes a support member configured to support an end part of the spigot. The support member is tiltable in a pipe radial direction between an inner peripheral surface of the socket and an outer peripheral surface of the spigot. The pipe-joining centering device also includes a position adjustment member configured to tilt the support member in the pipe radial direction. The support member and the position adjustment member are supported on the inner peripheral surface of the socket.Type: GrantFiled: December 20, 2019Date of Patent: May 17, 2022Assignee: KUBOTA CORPORATIONInventors: Shozo Kishi, Keita Oda, Ryunosuke Tanaka, Hideki Nakaya
-
Publication number: 20210312105Abstract: A construction management document creation device includes: a first input processing unit configured to repeat a process of assigning a unique pipe number and a unique joint number in association with pipe attribute information, and thereby generate pipe connection information from which connection relationship between laying pipes is identifiable based on the pipe number and the joint number, and pipe laying information from which a type and a laying position of each laying pipe are identifiable based on the pipe attribute information; a second input processing unit configured to generate assembled condition management information based on assembling procedure confirmation information and assembled condition evaluation information input for each pipe assembling section identified by the joint number; and a document generation processing unit configured to generate a construction management document including a daily construction report based on the pipe connection information, the pipe laying information, aType: ApplicationFiled: April 7, 2021Publication date: October 7, 2021Applicant: KUBOTA CORPORATIONInventors: Shozo KISHI, Yuito KOMARU, Kazuma HARADA, Akira YAMASHITA
-
Publication number: 20210095798Abstract: A pipe joint in which a seal body and a spacer are mounted from the insides of pipes, wherein: a spigot of one pipe is inserted into a socket of the other pipe; and an annular accommodation space is formed between the inner circumference of the socket and the outer circumference of the spigot. Inside the accommodation space are accommodated: a seal body for sealing the gap between the socket and the spigot; a push ring that presses the seal body to keep the seal body in a compressed state; and a spacer that maintains the interval between the push ring and the deep end of the socket in the pipe axial direction.Type: ApplicationFiled: March 19, 2019Publication date: April 1, 2021Applicant: KUBOTA CORPORATIONInventors: Shozo KISHI, Kazuya ITO, Kazuma HARADA, Keita ODA, Ryunosuke TANAKA, Kohei IKEDA, Yuito KOMARU
-
Patent number: 10738919Abstract: A first projection is formed on the outer periphery of a bulb part, a second projection is formed on the socket rear end of the bulb part, a tapered part is formed with a decreasing diameter from the inner periphery of a heel part to the inner periphery of the second projection, and a third projection is formed on the tapered part. A first dimension B from the first projection to the third projection in an inclination direction opposite to an inclination direction G of the tapered part is smaller than a second dimension C from the first projection to the second projection in a radial direction A.Type: GrantFiled: May 23, 2018Date of Patent: August 11, 2020Assignee: KUBOTA CORPORATIONInventors: Shozo Kishi, Takaaki Kagawa, Keita Oda
-
Publication number: 20200208765Abstract: A pipe-joining centering device aligns, with an axial center of one pipe, an axial center of another pipe when a spigot of the other pipe is to be inserted into a socket of the one pipe. The pipe-joining centering device includes a support member configured to support an end part of the spigot. The support member is tiltable in a pipe radial direction between an inner peripheral surface of the socket and an outer peripheral surface of the spigot. The pipe-joining centering device also includes a position adjustment member configured to tilt the support member in the pipe radial direction. The support member and the position adjustment member are supported on the inner peripheral surface of the socket.Type: ApplicationFiled: December 20, 2019Publication date: July 2, 2020Applicant: KUBOTA CORPORATIONInventors: Shozo KISHI, Keita ODA, Ryunosuke TANAKA, Hideki NAKAYA
-
Patent number: 10520119Abstract: An annular sealing material seals a pipe joint between a socket and a spigot. The sealing material includes a bulb part which is composed of a first bulb, a second bulb located closer to the inner side of the socket than the first bulb, and a narrow part present between the first and second bulbs. The first bulb is pressed against the inner circumferential surface of the socket. The second bulb is pressed against the outer peripheral surface of the spigot. The second bulb is inclined towards the pipe center from the first bulb in a natural state before it is provided between the socket and the spigot. The inner diameter of the second bulb is smaller than the outer diameter of the spigot in the natural state. The second bulb is extensible in the pipe diameter direction due to elastic deformation of the narrow part.Type: GrantFiled: December 18, 2015Date of Patent: December 31, 2019Assignee: Kubota CorporationInventors: Shozo Kishi, Takashi Yokomizo, Yoshinori Itani, Takaaki Kagawa, Kohei Ikeda, Shogo Kaneko
-
Patent number: 10443772Abstract: A pipe joint structure provided with: a heel section configured so that a spigot formed on the end section of a pipe is inserted via a seal member into a socket formed in the end section of another pipe and seal member is fitted to a recessed section formed on the inner circumferential section of the socket; and a valve section compressed between the inner circumferential surface of the socket and the outer circumferential surface of the spigot. Additionally, a marker member is provided to the heel section that is accommodated in the recessed section. The socket circumference section of the pipe joint structure is subjected to non-contact inspection by a marker detection device from the spigot-side pipe along the axial direction of the pipe and the quality of the joining state of the pipe joint structure is determined on the basis of whether the marker member is detected.Type: GrantFiled: September 29, 2014Date of Patent: October 15, 2019Assignee: KUBOTA CORPORATIONInventors: Shozo Kishi, Takaaki Kagawa, Keita Oda, Yuito Komaru
-
Publication number: 20180292033Abstract: A first projection is formed on the outer periphery of a bulb part, a second projection is formed on the socket rear end of the bulb part, a tapered part is formed with a decreasing diameter from the inner periphery of a heel part to the inner periphery of the second projection, and a third projection is formed on the tapered part. A first dimension B from the first projection to the third projection in an inclination direction opposite to an inclination direction G of the tapered part is smaller than a second dimension C from the first projection to the second projection in a radial direction A.Type: ApplicationFiled: May 23, 2018Publication date: October 11, 2018Applicant: KUBOTA CORPORATIONInventors: Shozo KISHI, Takaaki KAGAWA, Keita ODA
-
Publication number: 20180209869Abstract: A behavior estimation method includes a first step of calculating number of earthquake resistant joints required for absorbing a fault displacement amount in a pipe orthogonal direction, based on an allowable deflection angle and a pipe effective length, and calculating a deflection range in a pipe axis direction, a second step of calculating a load, received by the pipe due to relative displacement between the pipe and ground corresponding to a ground spring model in the pipe orthogonal direction defined with spring constants respectively for relative displacements smaller and larger than a predetermined relative displacement, a third step of calculating a bending moment distribution of joint positions from a bending moment of a trapezoidal distribution load, and obtaining a pipe deflection angle at each of the joint positions based on a predetermined joint deflection spring model, and a deflection performance evaluation step.Type: ApplicationFiled: March 9, 2018Publication date: July 26, 2018Applicant: KUBOTA CORPORATIONInventors: Shozo KISHI, Keita ODA
-
Patent number: 10018290Abstract: A first projection is formed on the outer periphery of a bulb part, a second projection is formed on the socket rear end of the bulb part, a tapered part is formed with a decreasing diameter from the inner periphery of a heel part to the inner periphery of the second projection, and a third projection is formed on the tapered part. A first dimension B from the first projection to the third projection in an inclination direction opposite to an inclination direction G of the tapered part is smaller than a second dimension C from the first projection to the second projection in a radial direction A.Type: GrantFiled: June 11, 2013Date of Patent: July 10, 2018Assignee: KUBOTA CORPORATIONInventors: Shozo Kishi, Takaaki Kagawa, Kazuya Ito
-
Patent number: 10006572Abstract: An annular sealing material seals a pipe joint between a socket and a spigot. The sealing material includes a bulb part which is composed of a first bulb, a second bulb located closer to the inner side of the socket than the first bulb, and a narrow part present between the first and second bulbs. The first bulb is pressed against the inner circumferential surface of the socket. The second bulb is pressed against the outer peripheral surface of the spigot. The second bulb is inclined towards the pipe center from the first bulb in a natural state before it is provided between the socket and the spigot. The inner diameter of the second bulb is smaller than the outer diameter of the spigot in the natural state. The second bulb is extensible in the pipe diameter direction due to elastic deformation of the narrow part.Type: GrantFiled: December 18, 2015Date of Patent: June 26, 2018Assignee: Kubota CorporationInventors: Shozo Kishi, Takashi Yokomizo, Yoshinori Itani, Takaaki Kagawa, Kohei Ikeda
-
Patent number: 9719618Abstract: An annular sealing material seals a pipe joint between a socket and a spigot. The sealing material includes a bulb part which is composed of a first bulb, a second bulb located closer to the inner side of the socket than the first bulb, and a narrow part present between the first and second bulbs. The first bulb is pressed against the inner circumferential surface of the socket. The second bulb is pressed against the outer peripheral surface of the spigot. The second bulb is inclined towards the pipe center from the first bulb in a natural state before it is provided between the socket and the spigot. The inner diameter of the second bulb is smaller than the outer diameter of the spigot in the natural state. The second bulb is extensible in the pipe diameter direction due to elastic deformation of the narrow part.Type: GrantFiled: March 20, 2014Date of Patent: August 1, 2017Assignee: Kubota CorporationInventors: Shozo Kishi, Takashi Yokomizo, Yoshinori Itani, Takaaki Kagawa, Kohei Ikeda, Shogo Kaneko